OSMIUM

osmium, Os, atomic number

(noun) a hard brittle blue-grey or blue-black metallic element that is one of the platinum metals; the heaviest metal known

Source: WordNet® 3.1

Etymology

Noun

osmium (countable and uncountable, plural osmiums)

A chemical element (symbol Os) with atomic number 76: a hard, brittle, heavy, bluish-white transition metal found as a trace element in alloys, mostly in platinum ores.

(countable) A single atom of this element.

Source: Wiktionary

Os"mi*um, n. Etym: [Gr. Odor.] (Chem.)

Definition: A rare metallic element of the platinum group, found native as an alloy in platinum ore, and in iridosmine. It is a hard, infusible, bluish or grayish white metal, and the heaviest substance known. Its tetroxide is used in histological experiments to stain tissues. Symbol Os. Atomic weight 191.1. Specific gravity 22.477.

Source: Webster’s Unabridged Dictionary 1913 Edition

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